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314e3da8bc
Has 2 failing specs... There are still some issue with this code's interaction with the undo system. The tab stops will need to be or destroyed when certain changes are undone or redone.
92 lines
2.8 KiB
CoffeeScript
92 lines
2.8 KiB
CoffeeScript
Point = require 'point'
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EventEmitter = require 'event-emitter'
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_ = require 'underscore'
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module.exports =
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class Anchor
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buffer: null
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editSession: null # optional
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bufferPosition: null
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screenPosition: null
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ignoreChangesStartingOnAnchor: false
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strong: false
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destroyed: false
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constructor: (@buffer, options = {}) ->
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{ @editSession, @ignoreChangesStartingOnAnchor, @strong } = options
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handleBufferChange: (e) ->
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{ oldRange, newRange } = e
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position = @getBufferPosition()
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if oldRange.containsPoint(position, exclusive: true)
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if @strong
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@setBufferPosition(oldRange.start)
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else
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@destroy()
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return
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return if @ignoreChangesStartingOnAnchor and position.isEqual(oldRange.start)
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return if position.isLessThan(oldRange.end)
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newRow = newRange.end.row
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newColumn = newRange.end.column
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if position.row == oldRange.end.row
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newColumn += position.column - oldRange.end.column
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else
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newColumn = position.column
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newRow += position.row - oldRange.end.row
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@setBufferPosition([newRow, newColumn], bufferChange: true)
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getBufferPosition: ->
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@bufferPosition
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setBufferPosition: (position, options={}) ->
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@bufferPosition = Point.fromObject(position)
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clip = options.clip ? true
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@bufferPosition = @buffer.clipPosition(@bufferPosition) if clip
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@refreshScreenPosition(options)
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getScreenPosition: ->
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@screenPosition
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getScreenRow: ->
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@screenPosition.row
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setScreenPosition: (position, options={}) ->
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oldScreenPosition = @screenPosition
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oldBufferPosition = @bufferPosition
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@screenPosition = Point.fromObject(position)
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clip = options.clip ? true
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assignBufferPosition = options.assignBufferPosition ? true
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@screenPosition = @editSession.clipScreenPosition(@screenPosition, options) if clip
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@bufferPosition = @editSession.bufferPositionForScreenPosition(@screenPosition, options) if assignBufferPosition
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Object.freeze @screenPosition
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Object.freeze @bufferPosition
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unless @screenPosition.isEqual(oldScreenPosition)
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@trigger 'moved',
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oldScreenPosition: oldScreenPosition
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newScreenPosition: @screenPosition
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oldBufferPosition: oldBufferPosition
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newBufferPosition: @bufferPosition
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bufferChange: options.bufferChange
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autoscroll: options.autoscroll
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refreshScreenPosition: (options={}) ->
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return unless @editSession
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screenPosition = @editSession.screenPositionForBufferPosition(@bufferPosition, options)
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@setScreenPosition(screenPosition, bufferChange: options.bufferChange, clip: false, assignBufferPosition: false, autoscroll: options.autoscroll)
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destroy: ->
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return if @destroyed
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@buffer.removeAnchor(this)
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@editSession?.removeAnchor(this)
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@destroyed = true
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@trigger 'destroyed'
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_.extend(Anchor.prototype, EventEmitter)
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